They are 2 mm length.
The larva is eating the green tissue of the leaves,
and making small tunnels in the leaves.
As a result, the photosynthesis of the plants is reduced.
Without photosynthesis the plant’s growth stops,
and the fruits stay small or are no any.
It is recommended to use at least 4 kinds of different pesticides,
and alternate between them every 3 days,
in order to overcome pest’s resistance, and completely exterminate them.
Best pesticides for leafminer,